Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: French
Origin: questionner 'to question'

questionnaire

 noun
     
ques‧tion‧naire [countable]
TCBB a written set of questions which you give to a large number of people in order to collect information
fill in/fill out/complete a questionnaire (=answer all the questions in it)
All staff were asked to fill in a questionnaire about their jobs.
! Do not use questionnaire to mean 'a study in which many people are asked questions to find out their opinions or behaviour'. Use survey: We conducted a survey (NOT a questionnaire) to find out what students think about sport.
Definition from the Longman Dictionary of Contemporary English
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